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All-solid aluminum electrolytic capacitor and preparation method thereof

An aluminum electrolytic capacitor, all-solid-state technology, applied in the direction of electrolytic capacitors, capacitors, capacitor parts, etc., can solve the problems of not being able to provide anodic oxide film, etc., and achieve the effects of improved conductivity, good temperature characteristics, and strong pressure tolerance

Active Publication Date: 2019-06-14
NANTONG RUITAI ELECTRONICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, although the solid electrolyte has high conductivity, it cannot provide oxidizing ions to repair the damaged anodic oxide film, and its withstand voltage is only 1 / 3 or 1 / 4 of that of the liquid organic electrolyte.

Method used

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Effect test

Embodiment 1

[0025] Such as figure 1 As shown, the nanocomposite material of polyaniline PANi and PbTe is prepared by in-situ polymerization, and the nanocomposite film is obtained after hot pressing; %, ammonium hypophosphite 10% electrolyte to prepare a solid nanocomposite membrane 3 containing anode aluminum foil repair ions; use sodium silicate Na 2 SiO 3 Prepare pH=8 active silicon solution with acetic acid HAc, immerse the anode aluminum foil 1 in the mixed solution of aminomethyltriethoxysilane APS and pH=8 active silicon solution for surface modification, and finally form silane oxygen on the anode aluminum foil 1 The base surface modification layer 2; the solid nanocomposite membrane 3 containing the anode aluminum foil repairing ions is assembled with the anode aluminum foil 1 forming the siloxyl surface modification layer 2, and the solid nanocomposite membrane 3 containing the anode aluminum foil repairing ions is assembled in sequence The graphite layer 4 and the conductive ...

Embodiment 2

[0027] The nano-composite material of polyacetylene PA and carbon nanotube is prepared by in-situ polymerization, and the nano-composite film is obtained after hot-pressing treatment; A solid-state nanocomposite membrane 3 containing anode aluminum foil repair ions was prepared in an electrolyte solution of 7% ammonium phosphate; 2 SiO 3 Prepare a pH=6.9 active silicon solution with acetic acid HAc, immerse the anode aluminum foil 1 in the mixed solution of aminomethyltriethoxysilane APS and pH=6.9 active silicon solution for surface modification, and finally form silane oxygen on the anode aluminum foil 1 The base surface modification layer 2; the solid nanocomposite membrane 3 containing the anode aluminum foil repairing ions is assembled with the anode aluminum foil 1 forming the siloxyl surface modification layer 2, and the solid nanocomposite membrane 3 containing the anode aluminum foil repairing ions is assembled in sequence Coating the graphite layer 4 and the conduct...

Embodiment 3

[0029] Preparation of Poly(3,4-Ethylenedioxythiophene PEDOT and Bi) by In Situ Polymerization 2 Te 3 The nanocomposite material of the nanocomposite material is obtained after hot-pressing treatment; the gained nanocomposite film is immersed in the electrolytic solution of 20% by weight of succinic acid, 75% of N,N-dimethylformamide, and 5% of ammonium hypophosphite A solid-state nanocomposite membrane 3 containing anode aluminum foil repair ions was prepared in ; with sodium silicate Na 2 SiO 3 Prepare a pH=7.8 active silicon solution with acetic acid HAc, immerse the anode aluminum foil 1 in the mixed solution of aminomethyltriethoxysilane APS and pH=7.8 active silicon solution for surface modification, and finally form silane oxygen on the anode aluminum foil 1 The base surface modification layer 2; the solid nanocomposite membrane 3 containing the anode aluminum foil repairing ions is assembled with the anode aluminum foil 1 forming the siloxyl surface modification layer...

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Abstract

The invention relates to an all-solid aluminum electrolytic capacitor and a preparation method thereof. The aluminum electrolytic capacitor replaces the electrolytic paper in the traditional capacitorwith a solid nano-composite film containing anode aluminum foil repair ions, and replaces the traditional anode aluminum foil with an anode aluminum foil with a silane oxygen group coupling surface.The preparation route includes the steps of preparing nano-composite film by in-situ polymerization, introducing anode foil repair ions, performing silane oxygen group coupling on the surface of the anode aluminum foil, and assembling an all-solid aluminum electrolytic capacitor with a graphite layer and conductive silver slurry. Compared with the prior art, the all-solid aluminum electrolytic capacitor provided by the invention solves the problems of large leakage current, liquid leakage, poor temperature characteristics and short service life at extreme temperatures of the aluminum electrolytic capacitor prepared by the traditional liquid organic electrolyte. At the same time, the problems of low flashover voltage and poor withstand voltage of the newly developed solid state aluminum electrolytic capacitor in recent years are solved, and the overall comprehensive performance of the aluminum electrolytic capacitor is greatly improved.

Description

technical field [0001] The invention relates to the technical field of electronic chemical industry, and specifically provides an all-solid aluminum electrolytic capacitor and a preparation method thereof. Background technique [0002] Traditional aluminum electrolytic capacitors usually use a liquid organic electrolyte. However, this system has a high resistivity, which makes the equivalent series resistance of the capacitor high, resulting in its high-frequency impedance being too large. On the other hand, the performance of liquid organic electrolyte is greatly affected by temperature, and its resistivity will rise sharply with the drop of temperature, which limits the use of capacitors at low temperatures; its performance is extremely unstable at high temperatures, and the rise in operating temperature If the temperature is too high, the electrolyte will deteriorate and the vapor pressure will increase to accelerate product failure and shorten the service life of the pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/00H01G9/004H01G9/045
Inventor 原鲜霞闻一婵薛瑄武
Owner NANTONG RUITAI ELECTRONICS
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